1 files changed, 2 insertions, 1 deletions

diff --git a/plugins/check_ups.c b/plugins/check_ups.c
index d1ded620..bb91c4ad 100644
--- a/plugins/check_ups.c
+++ b/plugins/check_ups.c
@@ -402,7 +402,8 @@ get_ups_variable (const char *varname, char *buf)
 
         /* create the command string to send to the UPS daemon */
         /* Add LOGOUT to avoid read failure logs */
-        if (snprintf (send_buffer, sizeof(send_buffer), "GET VAR %s %s\nLOGOUT\n", ups_name, varname) >= sizeof(send_buffer)) {
+        int res = snprintf (send_buffer, sizeof(send_buffer), "GET VAR %s %s\nLOGOUT\n", ups_name, varname);
+        if ( (res > 0) && ((size_t)res >= sizeof(send_buffer))) {
                 printf("%s\n", _("UPS name to long for buffer"));
                 return ERROR;
         }